High Lockout
2920 V on Worcester Bosch Greenstar 8000 Life/Style

Your boiler has stopped working because it cannot confirm that the flame is properly lit, causing the system to shut down for safety.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Error with the flame monitoring

What causes this fault?

This fault occurs when the boiler's internal computer is unable to detect a steady flame during the ignition process or while the burner is running. It is often caused by a dirty or damaged sensing probe that can no longer 'see' the heat, or a communication failure in the wiring that carries this signal to the control board.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

2924View →227View →

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